Opening explorer
Walk any move order through the catalog: pick a book continuation and watch the board, or open the matching ECO lines on the side. Move orders, not transpositions — exactly the paths over the board. Prefer the family trees? Every opening page has one.
1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. exf5 Nf6
◀ Undo move
♞ You have reached English Defense: Hartlaub Gambit Accepted A40 — the catalogued line ends exactly here.
Book continuations
No catalogued line continues from here — the book ends at this position. Undo a move or start a different order.
Matching openings 1
Only the line above reaches this exact move order.
3810 catalogued lines in total · openings encyclopedia